Hot-air furnace



Jan. 19 1926.

- 1,510,431 c. G. BUD ER Fig.1.-

. W e/775x".

Jan. 19 1926.

C. G. BUDER I HOT AIR FURNACE Filed April 11 1924 2 Sheets-Sheet 2 Czar/es An e/#60 Fade/3 V An object: of the invention- -is to pr r V i'o'rced draft circulatory 'systemxfor a hot} air furn'acein whiclrthe blower device; generates and introduces intorthesfurnace casin'g a V voiunie of air, said casing -b'eing interiorly" providedwith bafll'es adapteld to' directthe' currents of airab'out, the heating element of ::'bl ower.device.- H a Fig. 5 is 'a' detaile'd't view" of the blower Patented Jan. 19,1926):

CHARLES e.

-Ice DE .S' tomsqmssevm, n'c arommxonor m'ssoum' rTo-avll'whomit may-concern v i Be it known that I,--CHARLES GJBUDER a citizen of the UnitedStates, residing at st. Louis, Missouri, have invented anewl'and 6 useful" Hot-Air Furnace,

lowing'is atspecificationeg This invention relates to improvements in hot airfurnacesyand consists inthe novel construction hereinafter 'disclosed'r; r

' the furnace in such manner as .to obtain the "maximum paratus.

20 Another object ofthe invention isto'pro vide 'inmconnection witha furnace a blower apparatus having spacedgfan elem'ents ar ranged to generate converging currents of airfor introduction into 'thefurnace, which; 735 blower apparatus is so arranged thatwhen thesameis not in operation there will be a normalsupply of air through }the apparatus for introduction into the furnace.

Additional advantages of the construction will be apparent from thedetalled descr1ption taken in connection with: the acc'ompanying drawing, in which- Fig. .1 'isa planview with" the mag the'furnacepartiallyin section; y p 7 F ig. 2'lS a vertical section throughthe furnace. V "Fig. 3 is a furnacetaken at right -angles -to"Fig;?2.- .Fig. 4 is a VerticaI- sectiOnthrough" the 'fan construction. 7'

v 'Thefu rnace proper includes a casing -1 "i nl wh'ich 'is mounted a ffiredrum2 -w1th :1aCl1-- ators.- 3 arranged in j communication ,therewith and'i'offset rearwardly from thedrum.

'At the bottom of the 'radiatorsand connect; 7 ,ing'the same is a dust box 4 upwardly froni which. extends the smoke p p It will of which the fol heating efliciency from ap li blower housing 7; V w w }l jThe Lian devices of the blower] are, duplicafcfefin.construction, therinnerendsthereof being spaced apart. {The 'fansproper include discs 17 mounted ifa'stonthe shaftJlZ. Ex-' tendingf'ontwardly from the -discs"1 7"are a p I I h p a plurality ofcurved' blades 18,"the'outer fend s vertical section through thetationotthe fans be noted that the radiators are spaced rear wardlyrfrom the-drum and areconnectedf therewith} by. communicating 'pa ssages 6 and that the adust box extends: around :the rear segment of the drum "from whi'c'h'it isspaced,

' y rm ng pa a 'ay t e n h dust boa; and the side wall fofthe; drum, i *Atg'the rearof thefoaising'wlgthere'is a 7 opening intogwhich is connectedthe blowey; 'devicehousin'g'i; The'fblo-wer devicehous ing comprises a substantially' cylindrical;

s e lf h ifer e irar f fv c m es t edges of "thefopenfing in-thebackot the fur i f nace'casing itbeingiobserved'thatthere is an ,i l b'ner i e qm h bl w ho i g 1mm Y the furnace; Theblower housing is provid ed with end: inen bers 8'ha'ving central open-g ings andiinto which. {are fitted annula'rf flanges, t e yii b m lfj g t rh 'endi the blower casin g:airiinlet openingsfor 'thej introduction efai1-qint the blower. device: a Extending upwardlyfroin' the" 1owerparw the annular. flangesfi arebraokets l Q"that vsupportlbearing-1ne1nbers 11 ;Eorthe* fanshaftf *The' shaft 12 -*extends' transversely ofth'ef blower device :and is ournal'ed ateach end-"in the bearings 11 respectively, one'end; V 7 of the shaft extending: beyond one 1 end of the P blower 5 housing, said. extending end car-1';-

rying; a alley '13 "con'st'ituting a drive pulley for-:thes aft-:1-2-.*"-The pulleyf 13vis driven by BTU'DEB dF i msjn sqma, 'jss'sr ivomo"mmsssmamsm v V a belt 14 that? operatesfover a pulley i '1511'on I a motor shaft 16, the inotorM preferablyf being mounted o the-upper? walr b f th furnace easing into the furnace casing; it

being, understood that the direction of roi fi h r i ind ted. by "th arrow in, Fig;- 2

The peculiar cbnstruction off the fan devices I builds up i converging currents of 'ainthat meet at-the opening into. the'furnacf 'easingfandfthereby prevents any suc- It will thus beobservedthat there isl freej passageiiito each ofthe fan devices through .the opening formed by'the flanges' fan-cl outwardlyfbetween the blades-"18 ofthfe 'ffans. f

Whenthe blower device isoperated convlergv ing currents 10f air are} generated and; are j. expelled outwardl fromthebottonrof the opening'b'etween t 'eblowerhousingand the tion in the blower device, causing the currents of air generated by the blower device tobe expelled forwardly into the casing of the furnace. Additionally it will be observed that the combined area of the openin-gs within the flanges 9 is relatively large, providin for a normal inlet of air-through the fan e lements of the blower and into the casing of the furnace when the blower device is not under power.

Within the furnace casing and so arranged as to cause a complete diffusion of theair currents about the surface of the heated elements of the furnace are a series of baflie plates. There are spaced on either side of the normal line formed by the outer edges of the convergingcurrents a pair of inclined bafile plates 20. The baflie plates 20 diverge inwardly and are inclinedupwardly from the opening into the furnace casing, the outer ends thereof being spaced above the bottom .of the opening from the blowerhousing to the casing, so that a portion'o-f the inflowing current of air will be deflected forwardly into the furnace casink so as to contactwith the fire drum of the furnace, thereby heating the currents of air thus deflected as they rise in the casing of the furnace.

Within the space between the inner edges of the baffie plates20 and arranged vertically are a pair of battle plates 21 that converge inwardly toward the fire drum of the furname, said baffle plates deflecting the converging currents of :air from the blower in such a way as to cause a portion of the volume of air thus introduced to rise in the space between the drum and the radiators of the'furnace. g

It will thus be seen that the invention provides for the introduction of converging currents of air into the furnace casing and of so controlling the currents thus intro duced into the. furnace casing as to cause a complete circulation, of the air currents about the heat surfaces of the furnace. Additionally, it will be observed that it is a considerable advantage to have the blower construction designed so that when it is not under power there remains a direct passage wayfthroughthe blower for a volume of air for normal feed into the furnace casing.

This construction "results in a very high degree of efficiency, very materially increasing the heathgenerated by the furnace over that generated by a single fan blower device, and over an unbaffled interior construction of furnace casing.

I am aware that the invention may be modified in certain particulars without departure from the spirit and 'scope thereof.

What I claim and desire to secure by Letters Patent is 1. In a furnace comprising a fire drum anda casingenclosing andspaced from the fire drum and having an air inlet opening through one side and near the lower end thereof, a pair of'balile 'platesextending inwardly and upwardly from said opening and having their inner edges spaced from the fire drum and their "outer edges eontacting with said casing, and a "pair of approximately vertical baffle plates having thei'r' inner edges adjacent to the fire drum above the -planes of said first bafile plates,

said second pair of battle plates diverglng outwardly 1n planes ntersectlng sa d casing laterally from said opening.

2. In a furnace-compr sing a fire drum and a casing enclosing and spaced from the I fire drum and having an air inlet opening through one side and near the lower end thereof, a pair of baflleplates extending inwardly and upwardly from said opening and having their inner edges spaced from the fire drum and their outer edges contact-- ing with said casing, and a pair of approxi',

mately vertical baflie plates having their inner edges adjacent to the firedruni above theplanes of said first baffle-,plates, said second pair of baffle plates diverging outwardly in planes intersecting said casing laterally from said opening, the; outer edges ofvsaid second bafile plates terminating in a plane inwardly from the plane of the in,

ner edges of said first'baflie plates.

In a furnace comprising ,a fire drum and a casing enclosing and spaced from the fire drum andhaving an air inlet. opening through one side and near the lower end thereof, a pair of bafiie platesextending inwardly and upwardly from said opening and havingthei-r inner edges spaced from the fire drum and their outer edges contacting with said casing, apair of approximately vertical baiiie rplates having their in and a casing enclosing and spaced from the fire drum and having anair inlet opening through one side and nearthe lower end thereof, a pair of battle plates extending inwardly and upwardly from said opening and having their inner edges spaced from the fire drum and their outer edges .COl'ltacting with said casing, a pair of approximately vertical baffle plates having their inner edges adjacent to the firedrum above the planes of :said first baffle plates, said second pair of baflie .platesdiverging outwardly in planes intersecting said leasing laterally from saidopening, the outer edges of said second bafile plates terminating I f 15570,}1311 f means for forcing air through" saidfopening below and above'said first bafiie plat-esand into contact with said second bafile plates:

5. Ina furnace comprising a fire drum and a casing enclosing and spaced from the fire drum and having an air inlet j opening through one side and near the lower end thereof, a pair of-bafiie plates inclining inwardly and upwardly from saidopening and having their inner edges diverging and,

out of contact with said firedrum, a second pair of b aille plates 'havingtheir inneredges adjacent to. said fire drum and havingtheir inner ends below the planes of said first baffle'plates and their lower edges inclining outwardly and upwardly to an intersection f. i with their outer edges abovethe planes of said-first"bafllejplates, said second bafliej" I :sin ner"jends below'the planes of-said first..

plates diverging outwardly in planes inte'r secting said casing laterallyi froni the 'side edges of said opening} 6. In a furnace comprising a fire drum and a casing enclosing and spaced from the fire drum and having-an air inlet opening through onefside and near the lower end thereof, a pairof baifie' plates'inclining' ins. wardly and upwardly from said opening. and having their inner edges diverging and out of contact with said 'fire drunn' a second pair of baflie plates having their inner edges adjacent to said fire druin and having their inner ends below the planes of' said first b'a'flleplates and having their lower edges intersection. withtheir outer edges above the vplanes ofjsaid first bafile' plates; saidsecond V 'bafiie plates diverging outwardly in planesintersecting; said casing laterally from the 35 inclining outwardly and upwardly to. an

side edges of said opening,,a nd means for? forcingair through-said opening below all i f d baffle plates.

In'la furnace comprising a, firedrun anda casing enclosing andspaced from the fire "drum and having an air inlet opening through one side and near the-lower end thereof,a pair of bathe plates inclining in- Qwardly' and upwardly from" said opening and-having their innerv edges diverging and "outof contact with said'firedrum, ai second pair of battle plates having, their inner edges adjacent to "said firedruin and having-their- ;bafile platesjand having theirilower edges Kincliningoutwardly and upwardly *to -a-n intersection with I their outer; edges; above. the ,planes jot-said first baflief'plates, said second baflle plates diverging outwardly in 60 from the side edges of said opening, and .means for forcing air through saidopening planes intersecting, said casing laterally below I all ofsaid baflie, plates, andabove 7 CHARLES e. Bunnie;

*said' first -baflie plates and against said e I second' baffl'e plates. 

